Manual
Table Of Contents
- Support for QSIG Over BRI and Q.931 Over BRI Backhaul
- Feature Overview
- Supported Platforms
- Supported Standards, MIBs, and RFCs
- Prerequisites for Using This Feature
- Configuration Tasks
- Provisioning Tasks
- Monitoring and Maintaining the Feature
- Configuration Examples
- Provisioning Examples
- Command Reference
- Reference Information
- Obtaining Documentation
- Documentation Feedback
- Obtaining Technical Assistance
- Obtaining Additional Publications and Information
- Glossary
Support for QSIG Over BRI and Q.931 Over BRI Backhaul
Feature Overview
3
Cisco MGC Software Release 9.5(2)
Tip Use the Cisco Feature Navigator to determine which Cisco IOS software image supports the
MGCP-Controlled Backhaul of BRI Signaling feature on your platform. Access Cisco Feature Navigator
at http://www.cisco.com/go/fn
. You must have an account on Cisco.com. If you do not have an account
or have forgotten your username or password, click Cancel at the login dialog box and follow the
instructions that appear.
Related Features
The following features are related to this feature:
• MGCP-Controlled Backhaul of BRI Signaling (for the Cisco voice gateways)
• Support for QSIG Transparency feature (for the Cisco MGC)
Software Structural Changes
This section describes the structural changes to the MGC software for this feature. For information on
the structure of the rest of the MGC software, refer to the Cisco Media Gateway Controller Software
Release 9 Operations, Maintenance, and Troubleshooting Guide.
Changes to Cisco MGC Software Architecture
This section describes the changes made to the Cisco MGC software architecture for this feature.
Input/Output Subsystem
The Input/Output (I/O) subsystem consists of the I/O channel controllers (IOCCs) and the I/O channel
manager (IOCM), which manages them.
• The IOCM manages all IOCCs and monitors the hardware resource states of the hardware controlled
by the IOCCs.
• The IOCCs provide
–
A protocol-specific, message-based interface that allows nodes and platforms external to the
Cisco MGC to communicate with the Cisco MGC
–
An interface that allows buffering of messages to the call engine’s event dispatcher queue
• The Cisco MGC I/O subsystem includes the following IOCCs:
–
Basic Rate Interface (BRI)—Added in Release 9.5, this IOCC enables the backhaul of layer 3
QSIG and Q.931 messages in a TCP session. This IOCC is used between a Cisco MGC and
voice gateways that support BRI signaling backhaul.
–
Extended ISDN User Part (E-ISUP)—Cisco-proprietary protocol that enables the transport of
endpoint- and media gateway-specific information between two (or more) Cisco MGCs. This
protocol uses an enhanced ISUP base to support all ANSI and ITU ISUP messaging and
elements. It also has additional fields to support transport of service information (such as local
number portability (LNP), 800 numbers, and so on).
–
ISDN Level 3—Provides backhauling of ISDN (standard variants) to the Cisco MGC from a
media gateway.